:root {
  --bg: #f3f5f7;
  --card: #fff;
  --line: #dce1e6;
  --primary: #2563eb;
  --danger: #dc2626;
  --muted: #6b7280;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: #1f2937;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 16px auto;
  max-width: 860px;
}
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 12px; }
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 860px;
  margin: 20px auto 0;
}
.userbar { display: flex; align-items: center; gap: 12px; color: var(--muted); }
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: #374151; margin-bottom: 10px; }
input, select {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
}
button {
  padding: 8px 18px;
  border: 0;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  cursor: pointer;
}
button:hover { opacity: .9; }
button.link { background: none; color: var(--primary); padding: 0; }
.toolbar { display: flex; gap: 14px; align-items: flex-end; margin-bottom: 10px; flex-wrap: wrap; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 500; }
.error { color: var(--danger); min-height: 18px; }
.muted { color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }
#login-view { max-width: 380px; }
#upload-result { margin-top: 10px; font-size: 14px; line-height: 1.8; }
a { color: var(--primary); }